Steam boiler



Dec. 29

L. c. FRASER STEAM BOILER Filed p 14. 1921 2 Sheets-Sheet 1 5.63.1 7" UJ'6Z5JW 1 I I I o Dec. 29, 1925- 1,567,724

I L. C. FRASER swmm BOILER Filed Se t. 14, 1921 2 Sheets-Sheet a Patented Dec. 29, 1925.

UNITED STATES LESTER (LEBASEB, 0]? LOS ANGELES, CALIFORNIA.

STEAM BOILER.

' Application filed September 14, 1921. Serial No. 500,516.,

To all whom it may concern:

Be it known that I, LESTER O. FRASER, a citizen of the United States, residing at Los Angeles, in the county of Los Angeles and State of California, have invented a new and useful Steam Boiler, of which the following is a specification.

It is the object of this invention to provide a simple but extremely efiicient boiler of the upright type, wherein both a shell and a body within the shell are so constructed that they may contain water, the construction being such that a large heating area is afforded, in a boiler of but little height.

A mechanic may alter the structure shown, within the scope of what is claimed, without departing from the spirit of the invention.

In the drawings :Figure 1 shows in vertical section, a boiler constructed-in accordance with the invention; Figure 2 is a section on the line 22 of Figure 1; Figure 3 is a section on the line 33 of Figure 1.

The boiler includes a shell 1 comprising an outer cylindrical wall 2, an inner conical wall 3, a top or end 4 connecting the walls, and a bottom or end 5 connecting the walls. The walls 2 and 3 are connected by thimbles 6 and 7. The thimble 6 gives access to the burner (not shown), and the thimble 7 admits air.

The boiler comprises a body 9 including a lower header made up of a plate 10 carrying a tubular ring 11. An upper header in the form of a tubular ring 12 is provided. The members 12 and 11 are connected by pipes 14: forming the elements of a cone. As shown in Figure 3, certain of the pipes 1 1 are spaced enough so that access may be had to the interior of the body 9 by way of the thimble 6. The ring 11 has nipples 15 and 16 which support the shell 1, the ring 12 being conical so as to fit within the inner wall 3 of the shell, at the upper end thereof, the pipes 14 being disposed substantially parallel to the inner wall 3. The part 10 of the lower header may rest on a plate 18 constituting part of a support 17 of any sort, the plates 10 and 18 having cooperating holes 19 for the reception of a burner. Any kind of a burner may be used. No burner is shown because I know that I cannot claim a burner and a boiler in one application. A stack 20 is seated in the central opening of the ring 12.

The numeral 21 marks an inlet pipe connected to the nipple 16 and carrying a valve 22. An external connection 30 unites, the shell 1 with the ring 11 by way of the nipple 15. A conduit is branched off from the inlet pipe 21 and communicates with the top of the ring 12, a gauge glass 24 and hand.

valves 25 being interposed in the pipe, at common pet cock appearing at-26. A pressure gauge 27 controlled by a valve 28 is so mounted as to respond to pressure of steam in the conduit 23. A pop valve 29 is connected to the conduit 23. A connection 31 of inverted U-shape establishes communication between the top of the shell 1 and the top of the ring header 12. An outlet 32 is mounted in the top 4 of the shell 1 and is provided with a hand valve 33.

When combustion is brought about within the contour of" the body 9, the body is heated, and the shell 1 is heated also. In this connection, it should be observed that the shell 1 is not a mere enclosure for the body 9, but is an actual water-container. Owing to the aforesaid construction, a large heating surface is possible in a boiler of but little height, and a very efficient structure is the result.

The water enters the ring 11 by the pipe 21 and rises in the pipes 14:, dry steam accumulating in the header 12 and passing by way of the connection 31 into the top of the shell 1, whence the steam finds an exit through the outlet 32. Water delivered into the ring 11 passes by way of the connection 30 into the shell 1 and is converted into steam, the steam passing outwardly through the element 32.

Having thus described the invention, what is claimed is z- 1. In a boiler, a shell comprising an outer cylindrical wall, an inner conical wall, a top joining the upper ends of the walls and a bottom joining the lower ends of the walls; an upper ring header seated in the upper end of the inner wall, a lower ring header located at the lower end of the inner wall supporting the shell, and tubes connecting the headers and located within the inner wall, an inlet for the lower header, a connection between the upper header and the shell, a connection between the lower header and the shell, and an outlet for the shell.

2. In a boiler, a shell comprising an outer cylindrical wall and an inner conical wall, a to joining the upper ends of the walls and a ottom joining the lower ends of the walls; an upper ring header seated in the upper end of the inner wall, a lower ring header located at the lower end of the inner wall and having outstanding nipples supporting the shell, tubes extended between the headers and located within the inner wall, a connection extended between one of said nipples and the outer wall of the shell, a connection between the other of said nipples and the upper header, a gauge glass in the last-specified connection, an inlet for the lower header and communicating with the last-specified connection, an outlet for the shell, and a connection between the upper header and the shell.

3. In a boiler, a shell comprising an outer cylindrical wall, an inner conical wall, a top joining the upper ends of the walls and momma a bottom joining the lower ends of the walls, an upper ring header seated in the upper end of the inner wall, a plate located below the shell and having a reduced burner-receiving'opening, a lower ring header formed integrally with the plate and supporting the shell, and tubes connecting the headers and located within the inner wall, an inlet for the lower header, a connection between the upper header and theshell, a connection between the lower header and-the she-lhandan I outlet for the shell.

In testimony that lclaim the foregoing as my own, I have hereto aflixed my signature.

LESTER .C. FRASER. 

